body{background-color: #1b1b1b}
/*====================导航*********/
.header{
	width:100%;
	position:fixed;
	top:0;
	left:0;
	z-index:999;
	height:50px;
	padding: 0 30px;
	/*background: rgba(28, 35, 39, 0.8);*/
}
/*左侧logo*/
.header .left{
	width: 12%;
}
.header .left a img{
	height: 40px;
	margin-top: 6px;
}
.header .left .img2{
	display: none;
}
/*右侧*/
.header .nav{
	-webkit-transition: 0.5s;
	-moz-transition: 0.5s;
	-o-transition: 0.5s;
	transition: 0.5s;
	height: 100%;
	line-height: 50px;
	display: block;
}
.header .navbar_nav li{
	float:left;
	position: relative;
	display: block;
}
.header .navbar_nav li:after{
    content: "";
    width: 0;
    height: 2px;
    background: orangered;
    position: absolute;
    bottom: 0;
    left: 0;
    transition: all 0.5s ease 0s;
}
.header .navbar_nav li:hover:after{
    width: 100%;
}
.header .navbar_nav li a{
	text-decoration: none;
	height: 100%;
	padding: 0 25px;
	display: block;
	-webkit-transition: 0.5s;
	-moz-transition: 0.5s;
	-o-transition: 0.5s;
	transition: 0.5s;
	color: #fff;
	font-size: 16px;
}
.header .navbar_nav li:hover a{
	color: orangered;
}
.header .navbar_nav li.dropdown{
	display: inherit;
	position: relative;
}
.header .navbar_nav li.dropdown .jt{
	width: 20px;
	height: 20px;
	background: url(i/top.png) no-repeat;
	background-size: 100% 100%;
	display: block;
}
.header .navbar_nav li.dropdown .dropdown_menu{
	display: none;
	position: absolute;
	top:50px;
	width: 100%;
	background: #fff;
	box-shadow: 0 15px 27px 0 rgba(167,165,165,0.38);
	width: 120%;
    left: -10%;
}
.header .navbar_nav li.dropdown .dropdown_menu a{
	font-size: 14px;
	color: #666;
	padding: 0 10px;
	line-height: 40px;
	text-align: center;
	background: #fff;
	margin-bottom: 2px;
}
.header .navbar_nav li.dropdown:hover .dropdown_menu{
	display: block;
	background: #f3f3f3;
	-webkit-transition: 0.5s;
	-moz-transition: 0.5s;
	-o-transition: 0.5s;
	transition: 0.5s;
}
.header .navbar_nav li.dropdown:hover .dropdown_menu a{
	color: #666;
}
.header .navbar_nav li.dropdown:hover .dropdown_menu a:hover{
	color: #fff;
	background: orange;
}
/*白色背景的头部*/
.header.on{
	background: #fff;
	border-bottom: 1px solid #ccc;
}
.header.on .left .img1{
	display: none;
}
.header.on .left .img2{
	display: block;
}
.header.on .navbar_nav li a{
	color: #333;
}
.header.on .navbar_nav li:hover a{
	color: orangered;
}
#navToggle{
	display: none;
}

.m_nav{
	position: fixed;
	top: 0px;
	box-shadow: 0 15px 27px 0 rgba(167,165,165,0.38);
	width: 100%;
    height: 100%;
    background: #fff;
    transition: all ease 0.5s;
    -webkit-transition: all ease 0.5s;
	z-index: 1000;
    opacity: 1;
    visibility: visible;
    margin-top: 0;
    overflow-y: auto;
    transition: all .6s cubic-bezier(.77, 0, .175, 1) 0ms;
    top: 0;
    transform: translateX(100%);
}
.m_nav.open{
    transform: translateX(0);
}
.m_nav .top{
	height: 60px;
	padding: 20px;
	box-sizing: border-box;
}
.m_nav .top .closed{
	width: 30px;
	height: 30px;
	vertical-align: middle;
	float:right;
	cursor: pointer;
}
.m_nav .logo{
	width: 100%;
	margin:0 auto;
}
.m_nav .logo img{
	height: 50px;
	display: block;
	margin:30px auto;
}
.m_nav .ul{
	margin-top: 30px;
}
.m_nav .ul li{
	padding: 0 20px;
	border-bottom: 1px solid #f5f5f5;
	transform: translateY(0);
	-webkit-transform: translateY(100%);
    transform: translateY(100%);
    -webkit-transition: all .6s cubic-bezier(.77, 0, .175, 1) 0ms;
    transition: all .6s cubic-bezier(.77, 0, .175, 1) 0ms;
    opacity: 0;
}
.m_nav.open .ul li{
	opacity: 1;
    -webkit-transform: translateY(0);
    transform: translateY(0);
}
.m_nav .ul li:nth-child(1) {
    -webkit-transition: all .2s cubic-bezier(.77, 0, .175, 1) 0ms;
    transition: all .2s cubic-bezier(.77, 0, .175, 1) 0ms;
}
.m_nav .ul li:nth-child(2) {
    -webkit-transition: all .4s cubic-bezier(.77, 0, .175, 1) 0ms;
    transition: all .4s cubic-bezier(.77, 0, .175, 1) 0ms;
}
.m_nav .ul li:nth-child(3) {
    -webkit-transition: all .6s cubic-bezier(.77, 0, .175, 1) 0ms;
    transition: all .6s cubic-bezier(.77, 0, .175, 1) 0ms;
}
.m_nav .ul li:nth-child(4) {
    -webkit-transition: all .8s cubic-bezier(.77, 0, .175, 1) 0ms;
    transition: all .8s cubic-bezier(.77, 0, .175, 1) 0ms;
}
.m_nav .ul li:nth-child(5) {
    -webkit-transition: all 1.0s cubic-bezier(.77, 0, .175, 1) 0ms;
    transition: all 1.0s cubic-bezier(.77, 0, .175, 1) 0ms;
}
.m_nav .ul li:nth-child(6) {
    -webkit-transition: all 1.2s cubic-bezier(.77, 0, .175, 1) 0ms;
    transition: all 1.2s cubic-bezier(.77, 0, .175, 1) 0ms;
}
.m_nav .ul li a{
	display: block;
	text-decoration: none;
	color: #333;
	font-size: 16px;
	height: 50px;
	line-height: 50px;
	width: 100%;
}
.m_nav .ul li .dropdown_menu{
	display: none;
}
.m_nav .ul li.dropdown.active .dropdown_menu{
	display: block;
}
.m_nav .ul li .dropdown_menu a{
	display: block;
	height: 50px;
	line-height: 50px;
	padding: 0 40px;
	box-sizing: border-box;
	border-bottom: 1px solid #f5f5f5;
}
.m_nav .ul li .dropdown_menu a:last-child{
	border: none;
}
.banner{
	width: 100%;
}
.banner img{
	width: 100%;
}

@media screen and (max-width: 992px){
	.header{
		padding: 0 10px;
	}
	.header #navToggle {
		height: 100%;
		padding: 9px 15px;
		margin-right: -15px;
		display: inline-block;
		float: right;
	}
	.header #navToggle span {
		position: relative;
		width: 25px;
		height: 1px;
		margin-top: 19px;
	}
	.header #navToggle span:before,
	.header #navToggle span:after {
		content: '';
		position: relative;
		width: 100%;
		height: 1px;
		left: 0;
	}
	.header #navToggle span,
	.header #navToggle span:before,
	.header #navToggle span:after {
		-webkit-transition: 0.3s;
		-moz-transition: 0.3s;
		-o-transition: 0.3s;
		transition: 0.3s;
		display: block;
		background: #4f4f4f;
	}
	.header #navToggle span:before {
		top: 8px;
	}
	.header #navToggle span:after {
		bottom: 10px;
	}
	.header #navToggle.open span:before {
		top: 10px;
		-webkit-transform: translateY(-11px) rotate(-45deg);
		-moz-transform: translateY(-11px) rotate(-45deg);
		-ms-transform: translateY(-11px) rotate(-45deg);
		-o-transform: translateY(-11px) rotate(-45deg);
		transform: translateY(-11px) rotate(-45deg);
	}
	.header #navToggle.open span:after {
		bottom: 12px;
		-webkit-transform: translateY(10px) rotate(45deg);
		-moz-transform: translateY(10px) rotate(45deg);
		-ms-transform: translateY(10px) rotate(45deg);
		-o-transform: translateY(10px) rotate(45deg);
		transform: translateY(10px) rotate(45deg);
	}
	.header #navToggle.open span {
		background: none;
	}
	.header #navToggle.open span:before,
	.header #navToggle.open span:after {
		background: #4f4f4f;
	}
	
	.header .nav{
		display: none;
	}
	
	.banner img{
		height: 600px;
		object-fit: cover;
	}
}